<template>
  <div class="search">
    <div class="search-input-wrapper">
      <search-input v-model="query"></search-input>
    </div>
    <scroll
      ref="scrollRef"
      class="search-content"
      v-show="!query"
    >
      <div
        class="search-content"
        v-show="!query"
      >
        <div class="hot-keys">
          <h1 class="title">热门搜索</h1>
          <ul>
            <li
              class="item"
              v-for="item in hotKeys"
              :key="item.id"
              @click="addQuery(item.key)"
            >
              <span>{{ item.key }}</span>
            </li>
          </ul>
        </div>
        <div
          class="search-history"
          v-show="searchHistory.length"
        >
          <h1 class="title">
            <span class="text">搜索历史</span>
            <span
              class="clear"
              @click="showConfirm"
            >
              <i class="icon-clear"></i>
            </span>
          </h1>
          <confirm
            ref="confirmRef"
            text="是否清空所有搜索历史"
            confirm-btn-text="清空"
            @confirm="clearSearch"
          >
          </confirm>
          <search-list
            :searches="searchHistory"
            @select="addQuery"
            @delete="deleteSearch"
          ></search-list>
        </div>
      </div>
    </scroll>
    <div
      class="search-result"
      v-show="query"
    >
      <suggest
        :query="query"
        @select-song="selectSong"
        @select-singer="selectSinger"
      ></suggest>
    </div>
    <router-view v-slot="{ Component }">
      <transition
        appear
        name="slide"
      >
        <component
          :is="Component"
          :singer="selectedSinger"
        />
      </transition>
    </router-view>
  </div>
</template>

<script>
import SearchInput from '@/components/search/search-input'
import SearchList from '@/components/base/search-list/search-list'
import Scroll from '@/components/wrap-scroll'
import Suggest from '@/components/search/suggest'
import Confirm from '@/components/base/confirm/confirm'
import { ref, watch, computed, nextTick } from 'vue'
import { getHotKeys, search } from '@/service/search'
import { useStore } from 'vuex'
import { useRouter } from 'vue-router'
import storage from 'good-storage'
import { SINGER_KEY } from '@/assets/js/constant'
import useSearchHistory from '@/components/search/use-search-history'

export default {
  name: 'search',
  components: {
    Confirm,
    SearchInput,
    Suggest,
    SearchList,
    Scroll
  },
  setup() {
    const query = ref('')
    const hotKeys = ref([])
    const store = useStore()
    const router = useRouter()
    const selectedSinger = ref(null)
    const scrollRef = ref(null)
    const confirmRef = ref(null)
    const searchHistory = computed(() => store.state.searchHistory)
    const { saveSearch, deleteSearch, clearSearch } = useSearchHistory()

    getHotKeys().then(result => {
      hotKeys.value = result.hotKeys
    })

    // methods
    function addQuery(key) {
      query.value = key
    }

    function selectSong(song) {
      saveSearch(query.value)
      store.dispatch('addSong', song)
    }

    function selectSinger(singer) {
      saveSearch(query.value)
      selectedSinger.value = singer
      cacheSinger(singer)
      router.push({
        path: `/search/${singer.mid}`
      })
    }

    watch(query, async (newQuery) => {
      if (!newQuery) {
        await nextTick()
        refreshScroll()
      }
    })

    function refreshScroll() {
      scrollRef.value.scroll.refresh()
    }

    function cacheSinger(singer) {
      storage.session.set(SINGER_KEY, singer)
    }
    function showConfirm() {
      confirmRef.value.show()
    }

    return {
      confirmRef,
      scrollRef,
      query,
      hotKeys,
      selectedSinger,
      searchHistory,
      // methods
      addQuery,
      selectSong,
      selectSinger,
      showConfirm,
      // searchHistory
      deleteSearch,
      clearSearch
    }
  }
}
</script>

<style lang="scss" scoped>
.search {
	position: fixed;
	width: 100%;
	top: 88px;
	bottom: 0;
	display: flex;
	flex-direction: column;
	.search-input-wrapper {
		margin: 20px;
	}
	.search-content {
		flex: 1;
		overflow: hidden;
		.hot-keys {
			margin: 0 20px 20px 20px;
			.title {
				margin-bottom: 20px;
				font-size: $font-size-medium;
				color: $color-text-l;
			}
			.item {
				display: inline-block;
				padding: 5px 10px;
				margin: 0 20px 10px 0;
				border-radius: 6px;
				background: $color-highlight-background;
				font-size: $font-size-medium;
				color: $color-text-d;
			}
		}
		.search-history {
			position: relative;
			margin: 0 20px;
			.title {
				display: flex;
				align-items: center;
				height: 40px;
				font-size: $font-size-medium;
				color: $color-text-l;
				.text {
					flex: 1;
				}
				.clear {
					@include extend-click();
					.icon-clear {
						font-size: $font-size-medium;
						color: $color-text-d;
					}
				}
			}
		}
	}
	.search-result {
		flex: 1;
		overflow: hidden;
	}
}
</style>
